Vulnerability · Published Oct 18, 2026 · Assigned by VulnCheck
CVE-2026-112063libstrophe through 0.14.0 Stack-Based Buffer Overflow via SCRAM Salt in SCRAM_Hi
Medium 5.9
In plain English
A medium-severity stack buffer overflow in libstrophe from strophe. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 21% of all known vulnerabilities).
Severity (CVSS 3.1)5.9Medium
Exploit odds (30 days)0.3%top 79.0% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
libstrophe through 0.14.0 contains a stack-based buffer overflow vulnerability in SCRAM_Hi that allows malicious XMPP servers to overflow a 128-byte stack buffer by sending an oversized SCRAM salt. Attackers can send a server-first-message whose s= attribute decodes to more than 124 bytes, aborting the client or overwriting stack memory in NDEBUG builds.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | libstrophe | no fix listed | DEBIAN-CVE-2026-112063 |
| Debian:13 | libstrophe | no fix listed | DEBIAN-CVE-2026-112063 |
| Debian:14 | libstrophe | no fix listed | DEBIAN-CVE-2026-112063 |
| Ubuntu:22.04:LTS | libstrophe | no fix listed | UBUNTU-CVE-2026-112063 |
| Ubuntu:24.04:LTS | libstrophe | no fix listed | UBUNTU-CVE-2026-112063 |
| Ubuntu:26.04:LTS | libstrophe | no fix listed | UBUNTU-CVE-2026-112063 |
| Ubuntu:26.10 | libstrophe | no fix listed | UBUNTU-CVE-2026-112063 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| strophe | libstrophe | 0 – through 0.14.0 |
Weakness: CWE-121 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:H
References
- https://hackmd.io/@haindpwn/libstrophe-scram-salt-stack-overflow third-party-advisory
- https://github.com/strophe/libstrophe/blob/0.14.0/src/scram.c technical-description
- https://github.com/strophe/libstrophe/blob/0.14.0/src/sasl.c technical-description
- VulnCheck Advisory: libstrophe through 0.14.0 Stack-Based Buffer Overflow via SCRAM Salt in SCRAM_Hi third-party-advisory